Baggaley, A. R. and Campbell, J. P.Multiple-Discriminant Analysis of Academic Curricula by Interest and Aptitude Variables. Journal of Educational Measurement, 1967, 4, 143-149.
2.
Davis, F. B.Educational Measurements and Their Interpretation. Belmont, California: Wadsworth, 1964.
3.
Snow, C. P.The Two Cultures and the Scientific Revolution. Cambridge: Cambridge University Press, 1959.